Medtronic Capnostream 20p

Asset Type

Capnography Monitor

Manufacturer

Medtronic

Model

Capnostream 20p

What This Guide Helps With

This guide helps troubleshoot the RR LOW ALARM on a Medtronic Capnostream 20p capnography monitor. This alarm indicates that the measured respiration rate is below the lower alarm limit. It may reflect a true patient condition, poor breath detection, an accessory issue, incorrect alarm settings, or a monitoring setup problem.

Because a low respiratory rate can indicate respiratory depression, apnea risk, oversedation, airway obstruction, or clinical deterioration, this alarm must be treated as a patient safety alarm before it is treated as an equipment problem.

Step-by-Step Troubleshooting

Ensure Patient Safety First

• Treat the RR LOW ALARM as a possible patient emergency first.
• Check the patient immediately or confirm that clinical staff are already responding.
• Do not silence, dismiss, or troubleshoot through the alarm without clinical assessment.
• If the patient requires continued monitoring, move the patient to a backup monitor before evaluating the device.

Verify the Reported Alarm and Behavior

• Confirm the monitor is displaying RR LOW ALARM.
• Observe whether the alarm occurs during active monitoring, after patient movement, after changing the sampling line, intermittently, or continuously.
• Check whether the displayed respiration rate is low, missing, unstable, or inconsistent with observed patient breathing.
• Look for associated issues such as weak capnogram waveform, EtCO2 changes, no breath detection, or sampling line alarms.

Confirm Clinical Response Before Equipment Troubleshooting

• Ask nursing or respiratory staff whether the patient’s respiratory rate is actually low.
• Compare the monitor reading with direct patient observation or another clinical assessment method.
• If the patient’s respiration rate is truly below the alarm limit, the monitor may be functioning correctly.
• Do not remove the monitor from service for a real patient condition unless there is also evidence of device malfunction.

Check the Alarm Limit Setting

• Review the lower respiration rate alarm limit.
• Confirm the limit is appropriate for the patient population and care area.
• If the lower limit is set too high, repeated alarms may occur even when the patient is clinically stable.
• Have clinical staff adjust alarm limits only according to facility policy and the patient’s clinical needs.

Inspect the Sampling Line or Cannula

• Inspect the CO2 sampling line, nasal cannula, airway adapter, or FilterLine connection.
• Check for disconnection, loose connection, kinks, moisture, occlusion, cracked tubing, incorrect accessory, or cannula displacement.
• Confirm the sampling path is connected, unobstructed, and properly positioned.
• If the monitor cannot detect consistent breaths, it may display a falsely low respiration rate.

Check Patient Interface Placement

• Confirm the cannula or airway sampling device is positioned correctly on the patient.
• For nasal/oral cannulas, confirm the prongs are seated properly and the oral scoop is positioned near the mouth when applicable.
• Check whether the patient is mouth breathing, shallow breathing, moving, or poorly aligned with the sampling accessory.
• Poor placement can cause weak CO2 detection and missed breath counts.

Check the CO2 Waveform

• Observe the capnogram waveform on the monitor.
• Look for a strong regular waveform, weak waveform, intermittent waveform, flatline, near-flatline, or irregular breath detection.
• A reliable waveform should match patient breathing.
• If the waveform is weak or inconsistent, suspect sampling line position, patient breathing pattern, obstruction, or accessory condition before suspecting monitor failure.

Replace the Sampling Accessory

• Install a known-good compatible sampling line, cannula, or airway adapter.
• Allow the monitor time to detect breaths and update the respiration rate.
• If the respiration rate becomes accurate and the alarm clears, the original accessory was likely the cause.
• Disposable sampling accessories are common sources of false respiratory alarms.

Check for Environmental or Use-Related Causes

• Review whether the alarm occurs during patient movement, oxygen delivery changes, nebulizer treatment, suctioning, poor cannula fit, mouth breathing, or very shallow breathing.
• Confirm whether the alarm pattern matches a real use condition or signal quality issue.
• The monitor may be operating correctly while receiving an unstable or weak sample.

Compare With Another Monitor or Known-Good Setup

• If the patient is stable and clinical staff agree, compare the Capnostream reading with another monitoring method or known-good capnography setup.
• If the issue follows the patient or accessory setup, suspect the patient condition or sampling setup.
• If another setup reads normally while the Capnostream continues to show an inaccurate low respiration rate with known-good accessories, suspect a device-related issue.

Remove From Service if the Alarm Appears False and Cannot Be Corrected

• If clinical staff confirm the patient is breathing normally, alarm limits are appropriate, and known-good accessories do not correct the false RR LOW ALARM, remove the monitor from use.
• Label the device Out of Service.
• Send the monitor for repair or bench evaluation.

If the Problem Persists

If the RR LOW ALARM continues after patient condition, alarm settings, sampling line, accessory placement, waveform quality, environmental factors, and known-good accessories have been checked, external and common causes have been ruled out.

Persistent false low respiratory rate alarms may indicate a CO2 sampling, detection, sensor, or internal monitor issue.

The device should be removed from service, labeled Out of Service, and sent for repair or bench evaluation.

Clinical Use Tip

Never troubleshoot this alarm on an active patient while ignoring the patient condition. A low respiration rate can be a true clinical emergency. Move the patient to a backup monitor first if monitoring must continue while the Capnostream 20p is evaluated.

Work Order Documentation (CCR Method)

CCR = Complaint, Cause, Resolution

Complaint

What was reported by the clinical staff.

Example:
"Capnostream 20p displayed RR LOW ALARM during patient monitoring. Staff reported respiration rate was below the lower alarm limit or alarm appeared despite observed breathing."

Cause

What was observed during troubleshooting.

Example:
"Verified RR LOW ALARM. Clinical staff assessed patient condition. Checked lower RR alarm limit, sampling line, cannula placement, CO2 waveform, and accessory condition. Alarm was either consistent with patient respiratory status or suspected false after external causes were ruled out."

Resolution

What action was taken.

Example:
"Corrected sampling line/cannula placement, replaced CO2 sampling accessory, verified stable waveform and respiration rate reading, and returned monitor to service. If alarm persisted with known-good accessories, removed device from service and sent for bench evaluation."

Helpful Details to Include (If Known)

• Alarm behavior
• Accessories swapped
• Power behavior
• Environmental factors
• Indicator lights
• Final device status

Final Thought

The RR LOW ALARM must be treated as a possible patient emergency before assuming equipment failure. Clinical Engineering should confirm the alarm, verify patient safety response, check simple external causes, inspect sampling accessories, review waveform quality, and escalate only when the monitor remains unreliable after common causes are ruled out.

That is successful troubleshooting.